Given a text, write a compressed version of it in a single sentence.

The committee has also considered that the principal source of the allegations against you is David Chang, a witness whose credibility has been called into question by the Department of Justice, a United States district judge and his own conduct. In court documents, the government noted that Chang could not be trusted.
THe committee agrees that you, David Chang, should not be trusted as witness in this court case, as the Department of Justice questions your credibility.